智能压实质量数值仿真研究

Research on Numerical Simulation of Intelligent Compaction Quality

在道路路基压实过程中,随着压实的进行,土体力学参数实时发生变化,但目前的研究中仍假定其参数不变。针对这一问题,本文建立了压实度K与应变ε之间的关系,开展了室内试验并明确了压实度K与土体强度指标(粘聚力c、内摩擦角φ)间的关系,开发了ABAQUS有限元数值软件的子程序UMAT,实现了对路基土压实质量更为精确的计算,并与模型假定压实质量进行了比对分析,验证了路基土智能压实计算结果的精确性。在此基础上,进行压实程度影响因素(频率、激振力、自重)正交试验并进行敏感性分析。相关研究成果可为路基路面压实质量精确控制的相关研究提供指导和依据。

In the compaction process of road subgrade, the mechanical parameters of soil change in real time with the compaction process, but the current research still assumes that the parameters remain unchanged. In order to solve this problem, this paper established the compaction degree of the relationship between K and the strain ε, carried out the indoor test and cleared the compaction soil K and the intensity index (cohesive force c, internal friction Angle φ), the relationship between development of the fem software ABAQUS UMAT subroutine, implemented the compaction of subgrade soil quality more accurate calculation, and comparative analysis, the model assumes that the compaction quality intelligent subgrade soil compaction was verified the accuracy of the calculation results. On this basis, orthogonal tests were carried out on the factors affecting the degree of compaction (frequency, excitation force, weight) and sensitivity analysis was carried out. The calculated results are more stable and accurate. The related research results can provide guidance and basis for the research of precise control of compaction quality of subgrade and pavement.